Phase two of the Stephenson Avenue extension project scope of works involves the extension of Stephenson Avenue to Cedric Street, including a new Mitchell Freeway Interchange and upgrades to the Stirling Bus Interchange. The project will connect key activity hubs, including Westfield Innaloo Shopping Centre and the Osborne Park industrial area.

Clough as part of Acciona Clough Joint Venture (ACJV) was awarded by Main Roads WA the construction of Great Northern highway road over rail bridge and access road intersection for Gudai-Darri mine in the Pilbara region.

The scope of works includes the construction of 3.6 km of road for the approaches to the bridge over rail, the construction of the bridge over rail, and construction of side road upgrades of the Great Northern Highway and Gudai-Darri Mine Access Road (KMAR) intersection. This is the second transportation infrastructure project awarded to ACJV.

Clough scope includes EPC contract for the upgrade and refurbishment of the existing intake tower and outlet structures, that includes replacement of aging infrastructure and updating of the intake and outlet works to meet future climatic requirements.

​Lower minimum operating level in the reservoir by 6.6m.

Reduce dead storage capacity from 16.7GL to 6.2GL.

Reduce the surface area of the weir, to reduce annual evaporation by 1.5GL/year. (Volume of 600 Olympic Swimming Pools)

Extend the asset life of dam pipework and structures.​​​

The facility uses a floating multi-buoy morring system (MBM) where vessels of size 300GT – 20000GT may be received. A flexible hose connects the offloading vessel to a subsea PLEM (Pipeline End Manifold) which via an undersea pipeline of approximately 3.2 kilometres and an overland pipeline of approximately 2.1 kilometres, transports the LPG to the bullets at the storage terminal.

The near shore marine construction of the facility took 14 months to complete. Clough Murray & Roberts’ scope was completed very sucessfully, delivering the project on budget and on time. Utilising world leading engineering, construction management and project managmeent tools and resources the project was delivered to specification and is considered of world world class quality standard.

Through the implementation of our propriety Major Accident Prevention (MAP) HSE system, we were able to fulfil our goal of Zero Harm with no lost time injuries (LTIs) over duration of the project.

Clough Limited together with Transfield Services in a joint venture, was awarded a construction contract as part of QGC Pty Limited’s Queensland Curtis Liquefied Natural Gas (QCLNG) Project.

Stage one work commenced in the fourth quarter of 2012 and included early site civil works and front end planning work for the construction phase of compression facilities in central Queensland. QCLNG was one of the world’s first projects to turn coal seam gas into LNG. The project involves expanding QGC’s existing coal seam gas production in the Surat Basin of southern Queensland, building a 540 km natural gas pipeline network and constructing a natural gas liquefaction plant on Curtis Island, near Gladstone, where the gas will be converted to LNG for export.

Clough completed a construction management contract to support the advanced exploration works on the proposed Morobe Mining Joint Venture’s (MMJV) Wafi‑Golpu project in Papua New Guinea (PNG).

Work was conducted by Clough’s PNG subsidiary, Clough Nuigini, and involved the development of support infrastructure, including roads, bridges, a 500 man construction camp, power and water supply.

In December 2011, the Downer Clough Joint Venture (DCJV) was awarded an Engineering, Procurement and Construction (EPC) contract by CSBP Limited for the Nitric Acid Plant and Ammonium Nitrate Plant Number 3 (NAAN3). The award of the contract, followed the successful completion of the Early Contractor Involvement (ECI) phase of the project.

The NAAN3 Project (Nitric Acid Plant and Ammonium Nitrate Plant Number 3), part of a wider Ammonium Nitrate expansion (AN3) project, was undertaken on the existing CSBP site in Kwinana, Western Australia to enhance the ammonium nitrate production capability of the facility, and the ability of CSBP to service the growing resource industry demand for ammonium nitrate in Western Australia. The EPC scope involved project management, engineering, procurement, prefabrication, construction and pre-commissioning for the NAAN3 plant, located on Western Australia’s Kwinana strip. Engineering work commenced immediately, with the project management and construction team mobilising to site in early 2012.

Construction of over 400km of gas and water transmission pipelines, compression facilities, camps and associated infrastructure for Santos’ Gladstone LNG project.

In the second quarter of 2011 the STREICHER Clough Joint Venture secured the contract for construction of onshore pipelines and associated umbilical and cable installation for BHP’s Macedon Gas project near Onslow in Western Australia. The project scope included the construction of the onshore pipeline system comprising wet gas pipeline, shore crossing, horizontal directional drilling (HDD), umbilical lines and sales gas pipeline construction.

The CBI Clough Joint Venture was involved in the Engineering, Procurement and Construction (EPC) contract for the Hides Gas Conditioning Plant, as part of ExxonMobil’s PNG LNG project. The contract scope included the EPC work for the gas conditioning plant, nearby wellpads and associated piping and infrastructure, located in the Hela Province of Papua New Guinea.

The Clough Curtain Joint Venture (CCJV) is completed a contract by Esso Highlands Limited (a subsidiary of ExxonMobil Corporation) for the Upstream Infrastructure Works associated with the PNG LNG project.

The scope of work involved the construction of roads, bridges, wharves, laydown and camp areas and other critical infrastructure. The joint venture completed its scope for the Highlands Highway as well as all southern areas including the construction of two wharves and laydown area at Kopi, site works for the Gas Conditioning Plant and associated access roads and wellpads at Hides. The joint venture was also contracted to remain on site at Hides to undertake works in relation to the gas pipelines and additional wellpads.

Onshore engineering, procurement and module fabrication for the Devil Creek Development Project, located in the north west of Western Australia.

The contract followed Clough’s successful completion of the associated FEED and engineering phases. The scope of work included the installation of an additional solar compressor with associated pipe work and instrumentation on the existing Varanus Island plant in Western Australia’s Pilbara region.

Clough undertook a technically challenging contract for client Oil Search to build a 470 metre-long pipe bridge in the rugged Southern Highlands of south east Mananda, Papua New Guinea. The scope of work entailed the supply, fabrication, assembly and erection of a cable stayed suspension bridge spanning across the 500 metre deep Hegigio Gorge. Work included hydrocarbon transportation pipes, linking pipelines from the south east Mananda oil fields to the existing Agogo and Kutubu processing facilities.

Design and construct three major bridges and 4.5km of roads as Roe Highway Stage 7: South Street to Kwinana Freeway, connecting Tonkin Highway, Leach Highway and the Kwinana Freeway.​

In joint venture with Queensland civil contractors, Seymour Whyte Constructions, Clough was awarded contract for a section of the Brisbane Inner Northern Busway. Located in Herston, northwest of Brisbane, this section is the segment of the busway route, providing rapid transit for bus commuters from Brisbane City to the inner northern suburbs. Awarded in Q3 2002, the project incorporated the design, construction and commissioning of a 1.6 km dual lane carriageway and associated works. The busway passes through the environmental sensitive Victoria Park golf course and parklands setting. In addition to associated roadworks, the contract also included major structures consisting of three bridges and two ‘cut and cover’ tunnels with a combined length of some 400 m. The construction of a unique busway protection screen ensures the safety of commuters and busway infrastructure from the adjacent golf course operations.

As part of a broad program of improvements to public transport infrastructure in Perth, Clough was awarded the contract to design and construct Stage One of the Kwinana Freeway Bus Transitway, in conjunction with joint venture partner Henry Walker Eltin Contracting Pty Ltd.

The scope included the design and construction of two 6km dedicated bus lanes, a passenger transfer station, a bus-only bridge, three new footbridges, modifications to an existing footbridge and widening of the existing Canning Highway overpass to accommodate a dedicated bus lane and passenger platform.

The Baulderstone Clough Joint Venture was commissioned by Main Roads Western Australia to design and construct Phase 1 of the major Graham Farmer Freeway Project. The Phase 1 bypass links into the Mitchell Freeway and extends to East Parade in East Perth

The scope included:

• Tie-in roadworks;
• Pedestrian traffic ramps and bridges;
• Western and eastern tunnel portals and approaches;
• A 250 m rail tunnel and railway realignment;
• Relocation of existing services;
• Signalling, signage and landscaping.

This 688m long, 28.8m wide bridge was designed to accommodate six lanes of traffic. An unusual feature of the design was the provision of pedestrian walkways and cycle ways cantilevered from the lower flanges of the superstructure. The construction consisted of nine continuous spans of precast double-cell single box post-tensioned concrete segments, supported by sculptured reinforced concrete piers.
A significant achievement of the construction work was the employment of a technique developed by Clough to support each stage of the erection of the superstructure. A 500 tonne steel falsework truss, which was floated into position on barges, was suspended from the end of the previously completed stage of the superstructure to the next pier and cantilevered forward to the end of this stage.
The truss was cable stayed for additional support from a 34m high tower on the previous pier. The tower was guyed with back-stay cables that were tightened with hydraulic jacks as the weight of the precast deck was added to the truss.
Clough’s work on the Mt Henry Bridge won the Company the Institution of Engineers of Australia “Western Australian Engineering Award” for 1981

Clough undertook the construction of a five-span continuous pre stressed concrete bridge crossing the Swan River in Perth.
The bridge is comprised of five spans (48.8m, 70m, 97.6m, 70m, 48.8m). Its eight rows of beams, made up of precast segments 2.97m long and of varying depth, weigh up to 20 tonnes each. The bridge is post-tensioned longitudinally using the Gifford – Udall 19 wire 18mm diameter strand system, developed especially for the project.

At the time of its opening, the Narrows Bridge was the largest precast pre-stressed continuous beam bridge in Australia.